Glass block



FIG. 1 is a front view of the glass block;

FIG. 2 is a left side view of the glass block;

FIG. 3 is a right side view of the glass block;

FIG. 4 is a top plan view of the glass block; and

FIG. 5 is a bottom plan view of the glass block;

FIG. 6 is a front cross-sectional view of the glass block taken along lines VI--VI of FIG. 3 illustrating undulations upon the inner surface of the glass block, giving the glass block an undulating appearance; and,

FIG. 7 is a right side cross-sectional view of the glass block taken along lines VII--VII of FIG. 1 illustrating undulations upon the inner surface of the glass block, giving the glass block an undulating appearance. 

An ornamental design for a glass block, as shown. 